Spiral rope for liana raising, manufacturing method for the spiral rope and wall surface greening system

ABSTRACT

A spiral rope R for liana raising includes a core member  10  and a side member  20 . The side member  20  is wound around the core member  10  in the winding direction of a twiner B 1  of a liana B which grows up in the Northern Hemisphere of the earth.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a spiral rope for liana raising, a manufacturing method for the spiral rope and a wall surface greening system using the spiral rope.

2. Description of the Related Art

As a spiral rope of this kind, there is, conventionally, a rope adopted in a wall surface greening technology and a wire stretching device disclosed in Japanese Laid-Open Patent Publication No. 2006-36. This rope is constructed as follows.

A wire member which is formed by a metallic core member with a resin coated is spirally wound around a wire main body which is formed with steel wires twisted up together and is coated with a resin.

However, the rope adopted in the wall surface greening technology and the wire stretching device as described above has merely the above-mentioned spirally wound construction.

Therefore, in applying the wire stretching device to a liana, there arises a drawback that a twiner of the liana is hard to smoothly wind around the rope and may be detached from the rope, if the above-mentioned steel wires is wound around the wire main body toward a direction which does not match the winding feature of the twiner according to growth of the liana.

Furthermore, there arises a drawback that the appearance deteriorates, if the color tone of the outer surface of the rope does not match the color tone of the surroundings of the rope such as the liana.

SUMMARY OF THE INVENTION

It is therefore an object of the present invention to provide a spiral rope for liana raising which has a construction tailored to suite the growth features of a liana.

It is another object of the present invention to provide a manufacturing method for the spiral rope.

It is further object of the present invention to provide a wall surface greening system using the spiral rope.

To achieve this object, according to the present invention, there is provided a spiral rope for liana raising which comprises a core member formed from austenite-based stainless steel twisted wires; and a side member formed from austenite-based stainless steel twisted wires, and wherein the side member is spirally wound around the core member at intervals in a direction along a winding direction of a twiner of the liana.

Thus, the winding direction of the side member around the core member is coincided with the winding direction of the twiner of the liana. Therefore, the winding direction of the side member around the core member is a counter-clockwise direction when seen from the top end portion of the twiner of the liana along its growth, if the winding direction of the twiner of the liana is the counter-clockwise direction. Accordingly, spiral grooves are formed around the outer periphery of the spiral rope so as to coincide with the counter-clockwise direction.

On the other hand, the winding direction of the side member around the core member is a clockwise direction when seen from the top end portion of the twiner of the liana along its growth, if the winding direction of the twiner of the liana is the clockwise direction. Accordingly, spiral grooves are formed around the outer periphery of the spiral rope so as to coincide with the clockwise direction.

As a result, regardless whether the winding direction of the twiner of the liana is in the counter-clockwise direction or the clockwise direction, the liana may grow up while extending its twiner along the spiral grooves of the rope and smoothly winding the twiner around the core member.

As described above, the material constituting the core member and the side member is an austenite-based stainless steel twisted wire. Thus, the thermal conductivity of the austenite-based stainless steel twisted wire is as low as about a half of that of common carbon steel. Therefore, the twisted wire is hard to be heated as well as hard to be cooled.

Furthermore, the core member and the side member are made of twisted wires, as described above. Thus, the core member and the side member have increased surface areas respectively. Accordingly, the twisted wires made of austenite-based stainless steel promote heat radiation of the spiral ropes, when the irradiation of sunshine is strong in summer. As a result, the liana may be satisfactorily prevented from discoloration by heat.

An aspect of the present invention, the core coating body and the side coating body which coat the core member and the side member respectively are made of an identical or same kind of resin material with each other.

Therefore, an adhesion phenomenon is occurred between the core coating body and the side coating body wound around the core coating body, thereby to be incapable of slipping between the core coating body and the side coating body.

As a result, deviation of the side member from the core member may be assuredly prevented in a state where the side member coated with the side coating body is wound around the core member coated with the core coating body.

Another aspect of the present invention, at least one of the core coating body and the side coating body is made of a resin material which is obtained by adding to an identical or same kind of resin material a material which imparts a color tone capable of assimilating with the color tone of the liana.

Thus, at least one of the core coating body and the side coating body is assimilated with the color tone of the liana. As a result, may be achieved a unique effect that at least one of the core coating body and the side coating body is not conspicuous against the liana. As a result, a wall surface greening system may be maintained at a good appearance, in case the spiral rope having such a unique effect is adopted to the wall surface greening system.

Still another aspect of the present invention, at least one of the core coating body and the side coating body is made of a material which is obtained by adding to an identical or same kind of resin material a material which imparts a color tone capable of achieving complementary color contrast with respect to the color tone of the liana.

Thus, the color tone of at least one of the core coating body and the side coating body is in a complementary color contrast relationship with the color tone of the liana. As a result, at least one of the core coating body and the side coating body is not conspicuous against the liana. In addition, the wall surface greening system may be maintained at a good appearance, in case the spiral ropes is adopted thereto.

A further aspect of the present invention, the twisted direction of each element wire as a twisted wire of the side strand creates the above described predetermined cross angle with respect to the twisting direction of each element wire as a twisted wire of the core strand. Accordingly, a so-called anchor effect occurs between the side strand and the core strand.

Thus, a strong engagement of the side strand to the core strand is created to assuredly prevent the deviation in the winding position of the side strand from the core strand.

A still further aspect of the present invention, the twisting direction of each element wire as a twisted wire of one or a plurality of bundles of side strands creates the above described predetermined cross angle with respect to the twisting direction of each element wire as a twisted wire of the core strand. Accordingly, a so-called anchor effect occurs between one or a plurality of bundles of side strands described above and the core strand.

As a result, a strong engagement of one or a plurality of side strands described above to the core strand is created to assuredly prevent the deviation in the winding position of one or a plurality of bundles of side strands described above from the core strand.

Another aspect of the present invention, the core rope member includes a core strand constituted by a plurality of bundles of austenite-based stainless steel twisted wires, and a plurality of bundles of side strands each constituted by twisting a plurality of bundles of strands formed from austenite-based stainless steel twisted wires. And, the side rope member is a strand formed from austenite-based stainless steel twisted wires.

Here, with the core rope member and the side rope member constructed as described above, the winding direction of the side rope member around the core rope member is coincided with the winding direction of the twiner of the liana.

Still another aspect of the present invention, the twisting direction of each element wire as a twisted wire of the strand or the side rope member creates the above described predetermined cross angle with respect to the twisting direction of each element wire as a twisted wire of the plurality of bundles of side strands of the core rope member. Accordingly, a so-called anchor effect occurs between the side rope member and the core rope member to create a strong engagement of the side rope member to the core rope member. As a result, there may be assuredly prevented the winding position of the deviation of the side rope member from the core rope member.

To achieve the above mentioned object of the present invention, there is provided a wall surface greening system comprising a plurality of the spiral ropes for liana raising, wherein the plurality of spiral ropes are supported on a wall surface into a predetermined stretching pattern so as to be opposed to the wall surface.

Thus, it is capable of providing a wall surface greening system which may achieve the above-described effect of the invention, even if the predetermined stretching pattern is a diamond cross pattern, a check cross pattern or a stripe pattern.

To achieve the above mentioned object of the present invention, there is provided a manufacturing method for a spiral rope for liana raising which comprises the steps of:

forming a core coating layer and a side coating layer with an identical or same kind of resin material so as to coat a core member and a side member respectively formed from austenite-based stainless steel twisted wires; and

winding the side member around the core member spirally at intervals in a direction along a winding direction of a twiner of a liana,

wherein at least one of said core coating layer and the side coating layer is formed to coat at least one of the core member and the side member by means of a first colored resin material for assimilation obtained by mixing a colored resin material having a different molecular structure with the identical or same kind of resin material, or by means of a second colored resin material for assimilation obtained by mixing a colored resin material having a different melt index with the identical or same kind of resin material.

Further, there is provided a manufacturing method for a spiral rope for liana raising which comprises the steps of:

forming a core coating layer and a side coating layer with an identical or same kind of resin material so as to coat a core member and a side member respectively formed from austenite-based stainless steel twisted wires; and

winding the side member around the core member spirally at intervals in a direction along a winding direction of a twiner of a liana,

wherein at least one of the core coating layer and the side coating layer is formed to coat at least one of the core member and the side member by means of a first colored resin material for complementary color contrast obtained by mixing a colored resin material having a different composition with the identical or same kind of resin material, or by means of a second colored resin material for complementary color contrast obtained by mixing a colored resin material having a different melt index with the identical or same kind of resin material.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features and advantages of the invention will be apparent from the following description taken in connection with the accompanying drawings, wherein:

FIG. 1 is a front view showing a first preferred embodiment of a wall surface greening system according to the present invention;

FIG. 2 is a partially enlarged side view partially showing a spiral rope for liana raising of the wall surface greening system of FIG. 1, and a liana growing along the spiral rope;

FIG. 3 is a partial side view showing the spiral rope of FIG. 2;

FIG. 4 is a diagram illustrating a spiral rope structured to suit the winding direction of the lianas which grow in the Northern Hemisphere of the earth;

FIG. 5 is a diagram illustrating a spiral rope constructed to suit the winding direction of the lianas which grow in the Southern Hemisphere of the earth;

FIG. 6 is a schematic perspective view illustrating the state where the Karman vortex street is generated when wind blows to a round bar;

FIG. 7 is a diagram illustrating the regulating function of the spiral rope of FIG. 3;

FIG. 8 is a schematic diagram illustrating the diverting function of the spiral rope in the wall surface greening system of FIG. 1;

FIG. 9 is a partial side view showing an essential portion of a second preferred embodiment of the present invention;

FIG. 10 is a partially enlarged side view showing the spiral rope shown in FIG. 9;

FIG. 11 is a partial side view showing an essential portion of a third preferred embodiment of the present invention;

FIG. 12 is a partial side view showing an essential portion of a fourth preferred embodiment of the present invention;

FIG. 13 is a partial side view showing an essential portion of a fifth preferred embodiment of the present invention;

FIG. 14 is an enlarged cross-sectional view of a core rope member in the fifth embodiment;

FIG. 15 is an enlarged cross-sectional view of a side rope member in the fifth embodiment;

FIG. 16 is a front view of an eighth preferred embodiment of the present invention; and

FIG. 17 is a front view of a ninth preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a first preferred embodiment of a wall surface greening system according to the present invention. The wall surface greening system includes a plurality of spiral ropes R for liana raising or raising lianas.

These spiral ropes Rare, as shown in FIG. 1, supported by a plurality of tightening metallic fittings T between an upper portion of a wall surface W and the ground in such a manner that they are opposed to the wall surface W in an inclined state against the wall surface W with a diamond cross pattern, which is one of predetermined stretching patterns. In the first embodiment, a liana B is, in FIGS. 1 and 2, shown as an example which grows along the wall surface greening system.

The spiral rope R has, as shown in FIGS. 2 and 3, a core member 10 and a side member 20. The core member 10 is formed as a twisted wire including one core element wire 11 around which 6 or six side element wires 12 are twisted in Z-like shape (see FIG. 3).

The side member 20 is formed as a twisted wire including one core element wire 21 around which 6 or six side element wires 22 are twisted into a S-like shape. The side member 20 is spirally wound around the core member 10 along the longitudinal direction thereof toward a counter-clockwise direction (toward the twisting direction in the form of Z-like shape) at a predetermined winding pitch P (see FIG. 3). Accordingly, grooves 10 a are, as shown in FIGS. 2 and 3, formed to be spirally wound in the counter-clockwise direction around the outer periphery of the core member 10 upward in the drawings.

The above mentioned expression “twisting direction in the form of Z-like shape” means to twist the side element wires 12 around the core element wires 11 into the counter-clockwise direction upward when seen from the above in FIG. 3.

The above mentioned expression “twisting direction in the form of a S-like shape” means to twist the side element wires 12 around the core element wires 11 into the direction reverse (namely a clockwise direction) of the twisting direction in the form of the Z-like shape.

In addition, the core element wire 21 and the side element wires 22 of the side member 20, as well as the core element wire 11 and the side element wires 12 of the above-mentioned core member 10 are made of austenite-based stainless steel wires (SUS 304).

Herein, will be described the basis of winding the side members 20 around the core member 10 into the counter-clockwise direction.

In order to smoothly raise the liana B along each of the spiral ropes R of the wall surface greening system, it is necessary to match the winding direction of the side members 20 around the core member 10 with the growth feature of the twiner B1 of the liana B. In general, the winding direction of the twiner of the liana differs between the Northern and Southern Hemispheres of the earth. It is believed that this difference is resulted from the centrifugal force based on the rotation of the earth.

Specifically, the twiner of the liana which grows in the Northern Hemisphere of the earth grows as it winds in the counter-clockwise direction (in the leftward direction) when seen from its top end side along its growth. On the other hand, the twiner of the liana which grows in the Southern Hemisphere of the earth grows as it winds in the clockwise direction (in the rightward direction) when seen from its top end side along its growth.

Therefore, in the spiral rope R, it is necessary that as shown by the arrow in FIG. 4, seen from the top of the core member 10 of the Figure, the winding direction of the side member 20 around the core member 10 in the Northern Hemisphere coincides with the winding direction (the above mentioned counter-clockwise direction) of the twiner of the liana which grows in the Northern Hemisphere

On the other hand, as shown by the arrow in FIG. 5, it is necessary that the winding direction of the side member 20 around the core member 10 in the Southern Hemisphere coincides with the winding direction (the above mentioned clockwise direction) of the twiner of the liana that grows in the Southern Hemisphere.

From the above, in the first embodiment, on the assumption that the liana B grows in the Northern Hemisphere, the winding direction of the side member 20 around the core member 10 is, as shown in FIGS. 2 to 4, set to the counter-clockwise direction, seen from the top of the core member 10, so that it coincides with the winding direction (the above described counter-clockwise direction) of the twiner B1 (see FIG. 2) of the liana B.

Further, for forming the spiral rope R in the first embodiment, the predetermined winding pitch P described above may be arbitrarily set by merely winding the side member 20 around the core member 10 with a proper machine without using a dedicated stranding machine.

In the case the side member 20 is twisted as a strand around the core member 10 by the dedicated stranding machine, the predetermined winding pitch P described above is restricted to the stranding pitch determined in accordance with the specification of the stranding machine. For example, if the stranding machine has a specification which twists 6 or six side strands together around one core strand, the spiral rope R of the first embodiment is formed by twisting the side member 20 around the core member 10 with 5 or five side strands lacked.

According to the first embodiment constructed as described above, the side member 20 is wound around the core member 10 in the counter-clockwise direction (in the twisting direction in the form of the Z-like shape) so as to coincide with the winding direction of the twiner B1 of the liana B which grows in the Northern Hemisphere of the earth. Furthermore, the spiral grooves 10 a are formed around the outer periphery of the core member 10 as described above.

Therefore, the liana B may grow in such a manner that the twiner B1 winds around the core member 10 in the clockwise direction along the spiral grooves 10 a of the side member 20.

Since the winding direction of the side member 20 around the core member 10 coincides with the winding direction of the twiner B1 of the liana B as described above, the liana B can maintain its strong engagement with the spiral rope R. As a result, the liana B can not be detached from the spiral rope R and can be promoted to grow upward smoothly.

Further, since the liana B can maintain its strong engagement with the spiral rope R as described above, the liana B is prevented from being detached to drop from the spiral rope R or falling onto the ground before it actually occurs, even if strong wind comes or earthquake occurs. Thus, the growth of the liana B may not be disturbed.

Further, as is clear from the above descriptions, the winding construction of the side member 20 around the core member 10 is in the spiral construction. Thus, the following effects may be further achieved.

That is, the occurrence of the wind whizzing noise which is likely to occur in a conventional rope without the spiral structure can be suppressed. This means that the wind noise which is likely to occur in the conventional rope mentioned above is significantly reduced by the spiral rope R.

This point will be described in more detail. In general, when the wind blows to a round bar 2 from its left side as shown by the arrow 1 in FIG. 6, Karman vortex street 3 occurs as shown in FIG. 6 at the right side of the round bar 2 located downwind to cause the wind noise.

Contrary to the above, on the assumption that, in FIG. 6, the spiral rope R of the first embodiment is disposed instead of the round bar 2, the occurrence of Karman vortex street downwind of the spiral rope R may be suppressed, since the rope R has the spiral structure as described above. As a result, the occurrence of wind noise may be satisfactorily reduced by the spiral rope R.

The fact that the occurrence of the wind whizzing noise is suppressed as described above means that the spiral rope R has an excellent wind characteristic. Therefore, the force applied to the spiral rope R by the wind pressure can be satisfactorily reduced. As a result, the following effect can be further achieved.

In a wall surface greening system using a plurality of conventional ropes, the ropes have increased tensile strength against tightening fittings thereof in order to resist the wind pressure. Further, since the stretching balance of the ropes is destroyed by the wind pressure, there is a fear that the appearance as the wall surface greening system becomes poor. Therefore, an operation of readjusting the stretched state of the ropes has been required. When strong wind blows, especially at the time of typhoon, excessive stretching force is applied to the ropes due to the wind pressure, and as a result, there arises a fear that the ropes are detached from the tightening fittings.

Contrary to the above, when the wall surface greening system is constructed by using a plurality of the spiral ropes R as in the first embodiment, there is no need for the spiral ropes R to have increased tensile strength against the tightening fittings T, because each spiral rope R has a spiral structure having excellent wind characteristic as described above. Therefore, there is no need for the spiral ropes R to readjust their stretched state. Furthermore, the ropes R can be kept at properly balanced stretched condition, and the appearance of the wall surface greening system can be satisfactorily maintained. At the time of typhoon, the spiral ropes R may not be detached from the tightening fittings T even if the spiral ropes R do not have increased tensile strength against the tightening fittings T.

Further, the wall surface greening system exhibits a function of regulating rain water caused by rain in bad weather or drainage to the liana B, and also exhibits a function or operation of uniformly dispersing the water (dispersing function or operation) caused by drainage.

Hereinafter, the function or operation of the wall surface greening system will be described in detail. In the wall surface greening system, a plurality of the spiral ropes R are stretched into the diamond cross pattern as described above. Furthermore, each of the spiral ropes R has the spiral grooves 10 a as described above.

Accordingly, when rain water hits the spiral rope R, the rain water resides, as shown by a reference numeral f in FIG. 7, within the spiral grooves 10 a and becomes a flow of rain water. The flow of rain water flows downstream with its gravity along the spiral grooves 10 a as shown by the respective arrows in FIG. 7. This means that the spiral grooves 10 a serve as continuous drain ditches and exhibit a function of regulating the flow of rain water. As a result, the flow of rain water is regulated by the spiral grooves 10 a and can flow downward without coming out of the spiral grooves 10 a.

Further, in the wall surface greening system, a plurality of spiral ropes R are stretched into the diamond cross pattern as described above. Thus, the spiral ropes R adjacent to each other exert a diverting function at their crossing portion C (see FIG. 8) to the flow of rain water which flows downward through each of the spiral grooves 10 a (see reference numerals g and h in FIG. 8) in these adjacent spiral ropes R while being regulated. As a result, the flow of rain water flows downward along the adjacent spiral ropes R as it is regulated and diverted as shown by the arrows i and j (see FIG. 8) at the crossing portion C.

Here, provided that the rain water is to be drained to the liana, the drain water to the entire liana is efficiently and uniformly dispersed by the regulating function and diverging function as described above without causing a specific portion of the water to fall onto the ground.

In addition, if rain water concentrates to one portion, the rain water is not drained sufficiently and thus causes the root of the liana to be easily rotten. Contrarily, the occurrence of the root rot can be properly reduced by the synergy of the regulating function and diverging function as described above.

Further, in the first embodiment, the twisted wire consisting of the core element wire 11 and the side element wires 12 is made of austenite-based stainless steel wires together with the twisted wire consisting of the core element wire 21 and the side element wires 22. And, the core member 10 and the side member 20 are respectively formed by elongating an austenite-based stainless steel wire using a predetermined dice and by twisting a plurality of thus-stretched austenite-based stainless steel wires.

Here, the heat conductivity of the austenite-based stainless steel wire is 14 (kcal/m·hr·° C.), which is about a half of the common carbon steel. Therefore, the austenite-based stainless steel wire is hard to be heated as well as hard to be cooled. In addition, since the core member 10 and the side member 20 respectively consist of twisted wires, they have increased surface areas.

Accordingly, when the irradiation of sunshine is strong in summer, the heat release from the core member 10 and the side member 20 is promoted. As a result, the liana is satisfactorily prevented from discoloration by heat.

Further, since the outer peripheral surface of each spiral rope R of the first embodiment is convex and spiral based on a stranded structure thereof, the peripheral surface of the spiral rope R is increased in its area. Thus, the heat release from the spiral rope R is promoted and the discoloration of the liana by heat can be further prevented.

In addition, since the austenite-based stainless steel wire as described above is stretched using a dice, the surface of the resultant twisted wire is substantially in a mirror-like status. Thus, the contact angle between a water drop and the surface of the twisted wire (the surfaces of the core member 10 and the side member 20) is small. As a result, the function of draining rain water to the ground may be maintained high.

FIGS. 9 and 10 show an essential portion of a second preferred embodiment of the present invention. In the second embodiment, a spiral rope R1 for liana raising is, as shown in FIG. 9, adopted instead of the spiral rope R described in the first embodiment. In addition, as same as the first embodiment, a plurality of the spiral ropes R1 are supported in the diamond cross pattern by a plurality of tightening fittings T in such a manner that they are opposed to the wall surface W, so as to form the wall surface greening system.

Each of the spiral rope R1 includes a core rope member Ra and a side rope member Rb. The side rope member Rb is wound around the core rope member Ra at a predetermined winding pitch (13.8 mm) along the longitudinal direction thereof in the counter-clockwise direction (in the twisting direction in the form of the Z-like shape) (see FIGS. 9 and 10). Accordingly, spiral grooves 10 b are formed around the outer periphery of the core rope member Ra.

The core rope member Ra is, as shown in FIG. 10, provided with one bundle of core strand 30 and six bundles of side strands 40 in a 7×7 multi-stranded structure. The core strand 30 is formed as a twisted wire in the form of the Z-like shape with 7 or seven of twisted wires each of which is the core member 10 described in the first embodiment. Additionally, the 7×7 multi-stranded structure means a rope structure in which seven bundles are constructed respectively by a bundle of seven twisted wires and are twisted with each other.

The six bundles of side strands 40 each is formed as a twisted wire in the form of the Z-like shape with seven of twisted wires each of which is the core member 10 described in the first embodiment.

In the second embodiment, in the core rope member Ra, the outer diameter of the core strand is 0.77 mm, and the outer diameter of the element wire consisting of the core of the core strand 30 is 0.27 mm. The outer diameter of the element wire of the side strand consisting of the side portions of the core strand 30 is 0.25 mm, and the outer diameter of the side strand 40 is 0.66 mm. Further, the outer diameter of the element wire consisting of the core of the side strand 40 is 0.22 mm and the outer diameter of the element wire of the side strand consisting of the side portions of the side strand 40 is 0.22 mm.

As shown in FIG. 10, the side rope member Rb is constructed as a twisted wire in which six side element wires 52 are twisted around one core element wire 51 at a twisting pitch of 6.40 mm in the form of the Z-like shape. In this embodiment, the core element wire 51 and the respective side element wires 52 are made of the austenite-based stainless steel wires described above. In addition, the outer diameter of the side rope member Rb is 0.6 mm. The outer diameters of the core element wire 51 and the respective side element wires 52 of the side rope member Rb are 0.22 mm and 0.20 mm respectively.

According to the spiral rope R1 constructed as described above, the side rope member Rb is wound around the core rope member Ra at a predetermined cross angle (hereinafter, referred to a cross angle α) given between the twisting direction of the respective side element wires 52 as the twisted wires of the side rope member Rb and the twisting direction of the side element wires as the twisted wires of the respective side strand 40 of the core rope member Ra.

In the second embodiment, the above-mentioned cross angle α is set into an angle within the range of 90°±10°. The basis of setting the cross angle α into such an angle within the range is as follows.

The twisting direction of each side element wire as a twisted wire of each side strand 40 in the core rope member Ra is substantially perpendicularly crossed to the twisted direction of each side element wire as a twisted wire of the side rope member Rb wound around the core rope member Ra.

A deviation in the winding position of the side rope member Rb against the core rope member Ra may be effectively prevented on a basis of the construction in which the twisting direction of each side element wire as a twisted wire of each side strand 40 in the core rope member Ra is substantially perpendicularly crossed to the twisted direction of each side element wire as a twisted wire of the side rope member Rb wound around the core rope member Ra. Thus, it is most preferable that the above mentioned cross angle α is 90°.

As to the above, as a result of further study about the cross angle α, it has been confirmed that the deviation in the winding position of the side rope member Rb against the core rope member Ra can be prevented if the cross angle α is preferably an angle within the range of 90°±10°. For this reason, in the second embodiment, the cross angle is set to the value described above. Other constructions are the same as those of the first embodiment.

In the second embodiment constructed as described above, in the spiral rope R1, the side rope member Rb is wound around the core rope member Ra in the counter-clockwise direction (in the twisting direction into the Z-like shape) so as to match the winding direction of the twiner B1 of the liana B which grows up in the Northern Hemisphere of the earth. Furthermore, the spiral grooves 10 b are formed around the outer periphery of the core rope member Ra.

As a result, the same effects as the effects achieved by the spiral rope R and the wall surface greening system described in the first embodiment can be also achieved by the spiral rope R1 and the wall surface greening system of the second embodiment.

Further, in the spiral rope R1, the side rope member Rb is wound around the core rope member Ra in such a manner that the twisting direction of each side element wire 52 as a twisted wire of the side rope member Rb constitutes an angle within the range of 90°±10° or substantially a right angle with respect to the twisting direction of each side element wire as a twisted wire of each side strand 40 of the core rope member Ra.

In this embodiment, the direction of the side element wire of each side strand 40 appearing on the outer surface of the core rope member Ra is in substantially parallel with the longitudinal direction of the core rope member Ra, and this longitudinal direction crosses substantially at a right angle with the side element wire 52 of the side rope member Rb.

Accordingly, a so-called anchor effect is occurred between the side rope member Rb and the core rope member Ra in the spiral rope R1 thereby to strongly generate an engagement force of the side rope member Rb against the core rope member Ra. Thus, the deviation in the winding position of the side rope member Rb wound around the core rope member Ra can be assuredly prevented.

As a result, in stretching the spiral rope R1, it becomes possible to in the position between the side rope member Rb of the spiral rope R1 and the core rope member Ra, even when a wind pressure or an external stretching force which is applied to the spiral rope R1 due to trimming or felling of the liana B is occurred.

FIG. 11 shows an essential portion of a third preferred embodiment of the present invention. In this third embodiment, a spiral rope R2 for liana raising is adopted instead of the spiral rope R (see FIG. 3) described in the first embodiment. Additionally, a plurality of the spiral ropes R2 are supported into the diamond cross pattern by a plurality of the tightening fittings T, as same as described in the first embodiment, in such a manner that they are opposed to the wall surface W to form the wall surface greening system,

The spiral rope R2 consists of multi-stranded ropes with some side strands lacked. In the spiral rope R2, the core member 10 described in the first embodiment is adopted as a core strand (hereinafter, referred to as a core strand 10A) of the third embodiment. And also, 4 or four of the twisted wires each of which is the side member 20 of the first embodiment are adopted as 4 or four bundles of side strands of this third embodiment (hereinafter, referred to four bundles of side strands 20A).

Here, the spiral rope R2 is formed by using a dedicated stranding machine having a specification in which one bundle of core strand and six bundles of side strands are simultaneously twisted with each together. Thus, to construct the side strands 20A as four bundles means that the spiral rope R2 is formed as a rope with two bundles of side strands lacked (see the circles shown by the double-dotted lines in FIG. 11).

Specifically, the four bundles of the side strands 20A are simultaneously twisted up around the core strand 10A in the form of the Z-like shape at their inherent twisting pitches by using the dedicated twisting machine. Accordingly, spiral grooves 10 c are formed around the outer periphery of the core strand 10A so as to correspond to the lacked two bundles of side strands. Other constructions are the same as those of the first embodiment.

In the third embodiment as constructed above, in the spiral rope R2, four bundles of the side strands 20A are, as described above, wound around the core strand 10A in the counter-clockwise direction (in the twisting direction in the form of the Z-like shape) in such a manner that they extend along the winding direction (counter-clockwise direction) of the twiner B1 of the liana B which grows in the Northern Hemisphere of the earth. Furthermore, the spiral grooves 10 c are formed around the outer periphery of the core strand 10A as described above (see FIG. 11).

Therefore, the liana B grows, as same as the first embodiment, in such a manner that the twiner B1 winds smoothly around the core strand 10A in the clockwise direction along the spiral grooves 10 c. As a result, the same effects as those of the first embodiment can be also achieved in this third embodiment.

Further, as described above, the spiral rope R2 has the structure with two bundles of side strands lacked. Thus, the spiral rope R2 can be manufactured in the same manner as a normal rope, and thus, the spiral rope R2 is suitable for mass production.

Further, as described above, the spiral rope R2 has multi-stranded structure with two bundles of side strands lacked. Therefore, the surface of the spiral rope R2 becomes a spiral form with larger roughness. Thus, the spiral rope R2 has an increased outer surface area thereof. As a result, the heat release of the spiral rope R2 is promoted to thereby prevent the liana from discoloration by heat.

In the third embodiment, an example has been described in which the spiral rope R2 has a structure with two bundles of side strands lacked. However, the third embodiment is not limited thereto. Even if the spiral rope R2 has a structure with either one or three to five bundles lacked, the substantially same effects as of those of the third embodiment can be achieved.

In general, for example, instead of the side strands each having an outer diameter of 2 mm in a multi-stranded structure of 7 bundles×7 wires, the core strand and the respective side strands are simultaneously twisted up into one piece to form the spiral rope R2 in a multi-stranded structure of 5 bundles×7 wires or 4 bundles×7 wires with the number of bundles of side strands reduced by 2 or 3.

FIG. 12 shows an essential portion of a fourth preferred embodiment of the present invention. In this fourth embodiment, respective side strands 20A are twisted around the core strand 10A in such a manner that all the twisting directions of individual side element wires 22 as twisted wires of each side strand 20A described in the third embodiment create the cross angle α (equal to the angle within the range of 90°±10°) with respect to the twisting directions of individual side element wires 12 as twisted wires of the core strand 10A. Other constructions are the same as those of the third embodiment.

In the fourth embodiment as constructed above, four bundles of the side strands 20A are twisted around the core strand 10A, as described above, in such a manner that the twisting directions of individual side element wires 22 as the twisted wires of the side strand 20A create an angle within the range of 90°±10 or substantially a right angle with respect to the twisting directions of individual side element wires 12 as twisted wires of the core strand 10A.

Accordingly, the above mentioned anchor is occurred between the individual side strands 20A and the core strand 10A in the spiral rope R2, thereby to strongly generate an engagement of the individual side strands 20A with the core strand 10A. Thus, the deviation in the winding position of the individual side strands 20A wound around the core strand 10A can be assuredly prevented.

As a result, in stretching the spiral rope R2, it becomes possible to uniformly stretch the spiral rope R2 with constant tension. And also, there may not be occurred a deviation in the position between the respective side strands 20A of the spiral rope R2 and the core strands 10A, even when a wind pressure or an external stretching force which is applied to the spiral rope R2 due to trimming or felling of the liana B is occurred. Other effects are the same as those of the third embodiment.

When the specifications of the spiral rope R2, the core strand 10A and the individual side strands 20A are selected as shown in Table 1, the cross angle α has been obtained as α=95.2°. In addition, the outer diameters of the core and side element wires of the core strand 10A are set to 0.27 mm and 0.25 mm respectively. The outer diameters of the core and side element wires of the side strand 20A are 0.22 mm respectively.

TABLE 1 Twisting pitch Twisting direction Spiral rope R2   8(mm) Z Core strand 10A 3.08(mm) S Side strand 20A 2.64(mm) Z

In Table 1, the twisting pitch of the spiral rope R2 means a twisting pitch of four bundles of the side strands 20A twisted around the core strand 10A. The twisting pitch of the core strand 10A means a twisting pitch of the six side element wires 12 twisted around the core element wire 11. The twisting pitch of the side strand 20A means a twisting pitch of six side element wires 22 twisted around the core element wire 21.

Since the cross angle α is 95.2° as described above, the cross angle value satisfies an angle within the range of 90°±10°. Therefore, it is understood that the deviation in the position of the individual side strands 20A against the core strand 10A can be assuredly prevented.

FIGS. 13 to 15 show an essential portion of a fifth preferred embodiment of the present invention. In this fifth embodiment, a spiral rope R3 for liana raising is adopted instead of the spiral rope R described in the first embodiment. A plurality of the spiral ropes R3 is supported into the diamond cross pattern by a plurality of the tightening fittings T, as same as the first embodiment, in such a manner that they are opposed to the wall surface W, so as to form the wall surface greening system.

As shown in FIG. 13, the spiral rope R3 includes a core rope member Rc and a side rope member Rd. The core rope member Rc, includes as shown in FIG. 14, the core member 10 described in the first embodiment, and a core coating layer 60. The core coating layer 60 is formed to cover the core member 10 with a resin material.

On the other hand, the side rope member Rd includes, as shown in FIG. 15, the side member 20 described in the first embodiment, and a side coating layer 70. The side coating layer 70 is formed to coat the side member 20 with a resin material.

In the spiral rope R3, the side rope member Rd is wound around the core rope member Rc along the outer periphery of the core coating layer 60 of the core rope member Rc at a predetermined winding pitch in the counter clockwise direction (in the twisting direction in the form of the Z-like shape) with respect to the core rope member Rc. In addition, the outer diameter of the core rope member Rc (or the core coating layer 60) is 2.4 mm. The outer diameter and winding pitch of the side rope member Rd (or the side coating layer 70) are 1.8 mm and 8.4 mm respectively. The spiral outer diameter after winding of the side rope member Rd is 5.7 mm.

In the fifth embodiment, an identical or same kind of a resin material is adopted as each of the resin material for forming the core coating layer 60 and the side coating layer 70. This is for preventing the deviation in the winding position of the side rope member Rd against the core rope member Rc, by making impossible slip between the core rope member Rc and the side rope member Rd. In addition, the above mentioned deviation in the winding position corresponds to the deviation in the pitch of the spiral rope R3.

The reason why the deviation of the pitch can be prevented as described above is as follows. By use of the identical or same kind of the resin material as described above, an adhesion phenomenon is occurred between the core coating layer 60 of the core rope member Rc and the side coating layer 70 of the side rope member Rd wound around the core rope member Rc as described above. As a result, it is guessed that the slippage between the core rope member Rc and the side rope member Rd may be disabled.

In this embodiment, illustrating the identical resin material described above, there is exemplified polyamide, polyvinyl chloride, polyurethane, or polypropylene as forming materials used for both the core coating layer 60 and the side coating layer 70.

Further, illustrating the identical resin material described above, firstly, polyamide elastomer material is exemplified as a material for forming either one of the core coating layer 60 and the side coating layer 70, when polyamide is exemplified as a material for forming the remaining of the core coating layer 60 and the side coating layer 70.

Here, a block copolymer of polyamide and polyether is exemplified as the polyamide elastomer material.

Secondly, when polyamide is exemplified as a material for forming either one of the core coating layer 60 and the side coating layer 70, polyamide added with a plasticizer for imparting flexibility is exemplified as a material for forming as a material for forming the remaining of the core coating layer 60 and the side coating layer 70.

Alternatively, when polypropylene is used as a material for forming either one of the core coating layer 60 and the side coating layer 70 instead of polyamide, polypropylene elastomer material is exemplified as a material for forming the remaining of the core coating layer 60 and the side coating layer 70. There is EPT or EPR as the polypropylene elastomer material.

In addition, polyvinyl chloride added with a plasticizer is exemplified as polyvinyl chloride to be used instead of polyamide, and polyurethane elastomer material is exemplified against polyurethane. As additional information, it is sufficient if the main component of the resin material which forms either one of the core coating layer 60 and the side coating layer 70 is an identical or same kind of material. Other constructions are the same as those of the first embodiment.

In the fifth embodiment as constructed above, both the core coating layer 60 of the core rope member Ra and the side coating layer 70 of the side rope member Rb are made of the identical or same kind of the resin material with each other as described above.

Therefore, an adhesion phenomenon is occurred between the core coating layer 60 of the core rope member Rc and the side coating layer 70 of the side rope member Rd wound around the core rope member Rc, thereby to be incapable of slipping between the core rope member Rc and the side rope member Rd. Thus, the pitch deviation of the spiral rope R3, that is, the deviation in the winding position of the side rope member Rd against the core rope member Rc can be assuredly prevented.

Further, since both the core coating layer 60 and the side coating layer 70 are made of the resin material, heat conductivities of the core coating layer 60 and the side coating layer 70 are extremely low as compared with metallic wires such as steel wires which constitute the core member 10 and the side member 20.

Here, as is understood from the above description, the core member 10 and the side member 20 are made of twisted wires made of austenite-based stainless steel wires. Further, each outer surface of the core member 10 and the side member 20 is increased, since the outer peripheral surface of the twisted wire becomes the convex spiral shape.

Therefore, the core member 10 and the side member 20 with such respective increased outer surfaces are coated by the core member 10 and the side member 20 as described above, thereby to be largely capable of reducing the heat conductivity to the liana. As a result, the discoloration of the liana B based on strong irradiation of sunshine in summer or the like can be significantly reduced according to the spiral rope R3 of the fifth embodiment. As additional information, respective engagement forces between the core member 10 and the core coating layer 60 and between the side member 20 and the side coating layer 70 may be improved by the increased outer surfaces of the core member 10 and the side member 20 described above.

Further, as will be described later, pigment is added to the identical or same kind of resin material described above, thereby to be capable of obtaining various color tones in the core coating layer 60 and the side coating layer 70.

Further, for increasing the attachment strength between the core rope member Rc and the side rope member Rd, the core rope member Rc may be passed through the adhesive agent applying chamber which contains an adhesive agent and is filled with a pressurized nitrogen gas at an atmospheric pressure or higher. Thus, the adhesive agent adheres over the outer peripheral surface of the core coating layer 60. Thereafter, the side rope member Rd is spirally wound around the core rope member Rc as described above and then is passed through a drying chamber.

Accordingly, the side rope member Rd can be firmly adhered at its side coating layer 70 onto the core coating layer 60 of the core rope member Rc. In addition, as the adhesive agent described above, exemplified is an adhesive agent having an isocyanate group at an end thereof, for example, an adhesive agent with the product number GF-100A•B which is produced by Sakai Chemical Industrial Co. Ltd in Japan.

Further, in the fifth embodiment, the deviation in the winding position of the side rope member Rd against the core rope member Rc can be further assuredly prevented in cooperation with the adhesion phenomenon between the core coating layer 60 and the side coating layer 70, if the twisting direction of the respective side element wires as the twisted wires of the side member 20 of the side coating layer 70 creates the cross angle α (equal to an angle within the range of 90°±10°) with respect to the twisting direction of the respective side element wires as the twisted wires of the core member 20, as is substantially the same as the second embodiment. Other effects are the same as those of the first embodiment.

Next, a sixth preferred embodiment of the present invention will be described. The sixth embodiment is proposed under the following premise as an example for being applied to the fifth embodiment described above.

In general, the color tone of the outer surface of the spiral rope which is used in the wall surface greening system of the present invention or the conventional wall surface greening system is hard to satisfy a fitting condition to circumferential color tones. Herein, As the circumferential color tones, are exemplified the color tone of the twiners, leaves, flowers of the liana growing along the wall surface greening system, and the color tone of the wall surface becoming a background of the wall surface greening system.

If the above mentioned fitting condition to circumferential color tones is not satisfied, there are occurred drawbacks that the rope becomes conspicuous and impairs the appearance as the wall surface greening system. Accordingly, it is desirable that the color tone of the outer surface of the spiral rope in the present invention can satisfy the above mentioned fitting condition to circumferential color tones.

For this, if the coloring easiness of the resin material is utilized, it is possible that the color tone of at least one of the core coating layer 60 and the side coating layer 70 described in the fifth embodiment is assimilated with the color tone of the twiners, leaves and flowers of the liana or the color tone of the wall surface which is the background of the wall surface greening system.

Here, the assimilation means that the color tone of at least one of the core coating layer 60 and the side coating layer 70 is matched with the color tone of the twiners, leaves or flowers of the liana or the color tone of the wall surface which becomes the background of the wall surface greening system. The assimilation is one of examples which satisfies the above mentioned fitting condition to circumferential color tones.

Thus, in the sixth embodiment, it is set as a problem to be resolved that the color tone of at least one of the core coating layer 60 and the side coating layer 70 is assimilated with the color tone of the twiners, leaves or flowers of the liana of the color tone of the wall surface as the background, thereby to maintain an excellent appearance as the wall surface greening system.

In this sixth embodiment, as premising such a problem to be resolved, the color tone of at least one of the core coating layer 60 and the side coating layer 70 described in the fifth embodiment is assimilated with the color tone of the twiners and leaves of the liana or the wall surface which is the background.

Specifically, taking into consideration the color tone of the twiner B1 and the leaves B2 of the liana B (see FIG. 2) or the color tone of the wall surface W which is the background, the color tone of at least one of the core coating layer 60 and the side coating layer 70 is arranged into a dot design, a grain design or a pebble-like design, thereby to realize the above described assimilation.

For example, when the color tone of the twiner B1 of the liana B is in a light green color, the color tone of at least one of the core coating layer 60 and the side coating layer 70 is arranged into a dotted design including a large number of green dots on a white base material.

Thus, the color tone of at least one of the core coating layer 60 and the side coating layer 70 combines both the green colors of the twiner B1 and leaves B2 of the liana B and can be assimilated with the color tone of the liana B. As additional information, for example, although the color tone of the leaves of the liana is green, all the leaves are not an identical brightness and saturation, but these combine with each other to create dark green portions and other portions. In such a case, the dotted design serves to achieve the assimilation.

Further, when the color tone of the twiner B1 of the liana B is dark brown, the color tone of at least one of the core coating layer 60 and the side coating layer 70 is arranged into brown grain design. Thus, the color tone of at least one of the core coating layer 60 and the side coating layer 70 can be assimilated with the color tone of the twiner B1 of the liana B.

As the liana B grows up, the leaves B2 of the liana B grow into large sizes. Thus, the spiral ropes R3 are behind the leaves B2. However, in the early stage after the liana B is planted, the spiral ropes R3 of the wall surface greening system which are stretched into the diamond cross pattern are exposed to the outside. Accordingly, the spiral ropes R3 are conspicuous in contrast to the wall surface W which is the background.

At this time, when the wall surface W is in, for example, a marble-like design, at least one of the core coating layer 60 and the side coating layer 70 is provided with a pebble-like design. Thus, the pebble-like design which is in the color tone of at least one of the core coating layer 60 and the side coating layer 70 can be assimilated with the marble-like design. Especially, some kinds of lianas take 1 to 2 or more years to reach the higher floors of the building. Therefore, the marble-like design is preferable when the lianas taking long time to grow up are used for greening the wall surfaces at higher floors of the building.

Next, in the spiral rope R3 described in the fifth embodiment, the spiral rope R3 is manufactured as follows, for imparting the assimilating color tone described above to at least one of the core coating layer 60 and the side coating layer 70.

(1) First Manufacturing Method

The core member 10 and the respective side members 20 are manufactured in the same manner as described in the fifth embodiment. Further, a resin material having different molecular structures is colored, and the colored resin material is mixed with the resin material described in the fifth embodiment (an identical or same kind of resin material described above) so as to prepare the first colored resin material for assimilation.

Then, at least one of the core coating layer 60 and the side coating layer 70 is molded by the first colored resin material for assimilation so as to cover at least one of the core member 10 and the side member 20, thereby to manufacture the core rope member Rc and the side rope member Rd. In addition, the remaining one of the core member 10 and the side member 20 which is not covered with the first colored resin material for assimilation is covered with the resin material described in the fifth embodiment (the identical or same kind of resin material).

Next, the side rope member Rd is spirally wound around the core rope member Rc at intervals in the longitudinal direction in the same manner as described in the fifth embodiment. At this stage, the side rope member Rd is wound around the core rope member Rc in such a manner that the winding direction of the side rope member Rd around the core rope member Rc coincides with the winding direction of the twiner (B1) of the liana (B) which grows in the Northern Hemisphere of the earth.

As described above, the spiral rope of this sixth embodiment can be manufactured by covering at least one of the core coating layer 60 and the side coating layer 70 of the spiral rope R3 described in the fifth embodiment with the first colored resin material for assimilation.

By stretching thus-manufactured spiral rope over the wall surface greening system, not only the effects described in the fifth embodiment can be naturally achieved but also the color tone of at least one of the core coating layer 60 and the side coating layer 70 can be assimilated with the color tone of the liana. As a result, the spiral rope manufactured in the sixth embodiment is not conspicuous against the liana.

(2) Second Manufacturing Method

The core member 10 and the respective side members 20 are manufactured in the same manner as above. Further, colored resin material with different melt index (MI) is mixed with the resin material described in the fifth embodiment (the identical or same kind of resin material) so as to prepare a second colored resin material for assimilation. Then, at least one of the core coating layer 60 and the side coating layer 70 is molded with the second colored resin material for assimilation in such a manner that at least one of the core member 10 and the respective side members 20 is covered, thereby to manufacture the core rope member Rc and the side rope member Rd. In addition, the remaining one of the core member 10 and the side members 20 which is not covered with the second colored resin material for assimilation is covered with the resin material described in the fifth embodiment (the identical or same kind of resin material). The steps and effects other than described above are the same as those described for the first manufacturing method.

(3) More specifically, there are the following manufacturing methods.

(a) Method for Imparting a Dot Pattern

A plastic resin material or elastomer which cross-links with an organic oxide is blended with a coloring pigment and an organic peroxide. Then, at least one of the core member 10 and the side member 20 is molded to be covered with the resultant blend, thereby to manufacture at least one of the core rope member Rc and the side rope member Rd. Thus, at least one of the core coating layer 60 of the core rope member Rc and the side coating layer 70 of the side rope member Rd can express a dotted pattern on its outer surface.

(b) Method for Imparting a Grain Design

A high density polyethylene with a melt index of 5 or lower is mixed with inorganic powder and a coloring agent so as to prepare a coloring agent composition. Then, the coloring agent composition is added to an olefin-based resin material. Subsequently, At least one of the core member 10 and the side members 20 is molded to be covered with the resultant mixed composition, thereby to manufacture at least one of the core rope member Rc and the side rope member Rd. Thus, at least one of the core coating layer 60 and the side coating layer 70 can express a grain design on its outer surface.

(c) Method for Imparting a Pebble-Like Design

A proper amount of a normal thermoplastic resin with no cross-linking reactivity is added to a coloring agent with a small melt index and a high melting point, or the blended agent adopted in the method for imparting the dot pattern. Then, at least one of the core member 10 and the side members 20 is molded to be coated with the mixed agent of which mixing rate is adjusted, thereby to manufacture at least one of the core rope member Rc and the side rope member Rd. Thus, at least one of the core coating layer 60 and the side coating layer 70 can express a pebble-like design which seems as if pebbles flow. Other constructions and effects are the same as those described in the fifth embodiment.

Next, a seventh preferred embodiment of the present invention will be described. This seventh embodiment is proposed under the following premise, as an example for being applied to the fifth embodiment.

In this seventh embodiment, by utilizing the coloring easiness of the resin material described in the sixth embodiment, it is set to a problem to be resolved that unlike the assimilation described in the sixth embodiment, a color tone of at least one of the core coating layer 60 and the side coating layer 70 is arranged into a color tone in a complementary color contrast with respect to the color tone of the twiners, leaves, or flowers of the liana or the color tone of the wall surface which is the background of the wall surface greening system, thereby to maintain the good appearance as the wall surface greening system. Additionally, the complementary color contrast is another example of satisfying the fitting condition to the circumferential color tones described in the sixth embodiment.

Thus, in the seventh embodiment, as premising the above described problem to be resolved, the color tone of at least one of the core coating layer 60 and the side coating layer 70 described in the fifth embodiment is brought into the color tone in the complementary color contrast with respect to the color tone of the liana B or the color tone of the wall surface W which is the background of the wall surface greening system.

Specifically, at least one of the color tone of the core coating layer 60 and the side coating layer 70 is brought into the color tone in the complementary color contrast with respect to the color tone of the flowers of the liana B.

For example, if the color of the flowers of the liana B is “red”, the color tone of at least one of the core coating layer 60 and the side coating layer 70 is set to “green”. Thus, clearer red color can be presented. This is given by the reason why “red” and “green” are opposite colors to each other in a hue circle, and are in a complementary color contrast relationship with each other.

Further, the color tone of at least one of the core coating layer 60 and the side coating layer 70 may be arranged into either one of a dot design, a grain design and a pebble-like design as same as in the sixth embodiment. In this case, it is sufficient for the color tone of at least one of the core coating layer 60 and the side coating layer 70 to be in a complementary color contrast relationship with the color either one or both of whose brightness and color saturation are higher.

Next, in the spiral rope R3 described in the fifth embodiment, the spiral rope R3 is manufactured in either one of the following methods, for imparting the color tone in the complementary color contrast relationship to at least one of the core coating layer 60 and the side coating layer 70.

(1) First Manufacturing Method

A first manufacturing method of the seventh embodiment differs from the first manufacturing method described in the sixth embodiment in which at least one of the core member 10 and the side member 20 is molded to be coated with a first colored resin material for complementary color contrast, instead of the first colored resin material for assimilation.

Herein, the above mentioned first colored resin material for complementary color contrast is manufactured by a process that a colored resin material obtained by coloring a resin material with a different composition is mixed with the resin material (the identical or same kind of resin material) described in the fifth embodiment.

According to this method, unlike the color tone resulted from assimilation described above, a color tone in a complementary color contrast relationship with the color tone of the flowers of the liana B can be achieved in either one of the core coating layer 60 and the side coating layer 70. As a result, the spiral rope manufactured in this seventh embodiment is not conspicuous against the liana B. Other constructions and effects are the same as those of the fifth embodiment.

(2) Second Manufacturing Method

A second manufacturing method of the seventh embodiment differs from the first manufacturing method described above in which at least one of the core member 10 and the side member 20 is molded to be coated with a second colored resin material for complementary color contrast, instead of the first colored resin material for assimilation described above.

Herein, the above mentioned second colored resin material for complementary color contrast is manufactured by a process that a colored resin material for complementary color contrast with different melt index (MI) is mixed with the resin material described in the fifth embodiment.

Accordingly, the same effects as those of the first manufacturing method described above can be achieved.

FIG. 16 shows an eighth embodiment of the present invention. In the eighth embodiment, a wall surface greening system as shown in FIG. 16 is adopted instead of the wall surface greening system described in the first embodiment.

The wall surface greening system of this eighth embodiment is supported between the upper portion of the wall surface W and the ground in such a manner that a plurality of the spiral ropes R for liana raising described in the first embodiment are stretched by a plurality of tightening fittings T and opposite tightening bars T1, T2. Other constructions are the same as those of the first embodiment.

According to the eighth embodiment as constructed above, the same effects as those of the first embodiment can be achieved except for the diverging effect.

The wall surface greening system of the eighth embodiment is not limited to the wall surface greening system described in the first embodiment, but alternatively may be adopted instead of the wall surface greening system described in any one of the second to seventh embodiments.

According to the above, the effects described in either one of the second to seventh embodiments can be achieved except for the diverging effect.

FIG. 17 shows a ninth preferred embodiment of the present invention. In this ninth embodiment, a wall surface greening system as shown in FIG. 17 is adopted instead of the wall surface greening system described in the first embodiment.

The wall surface greening system of the ninth embodiment is supported between the upper portion of the wall surface W and the ground in such a manner that a plurality of the spiral ropes R for liana raising described in the first embodiment is stretched by a plurality of tightening fittings T and opposite tightening bars T1, T2 so as to be inclined with respect to the wall surface W in a straight pattern. Other constructions are the same as those of the first embodiment.

According to the ninth embodiment as constructed above, the effects described in the first embodiment can be achieved except for the diverging effect.

In addition, the wall surface greening system of the ninth embodiment is not limited to the wall surface greening system described in the first embodiment, but may be adopted instead of the wall surface greening system described in any one of the second to seventh embodiment.

According to the above, the effects described in any one of the second to seventh embodiments can be achieved except for the diverging effect.

In carrying out the present invention, it is not specifically limited to the embodiments described above, but the following various modifications may be exemplified.

(1) Each of the foregoing embodiments is described on the premise that the liana grows in the Northern Hemisphere in the earth. Instead, for the liana which grows up in the Southern Hemisphere in the earth, the side member (the side member 20, the side rope member Rb or the side rope member Rd) is wound around the core member (the core member 10, the core rope member Ra or the core rope member Rc) in the clockwise direction, when seen from the top end portion of the twiner along its growth, in such a manner that the winding direction of the side member around the core member coincides with the winding direction of the twiner of the liana which grows in the Southern Hemisphere in the earth (see FIG. 5).

In this manner as well, the substantially same effects as those described in the foregoing embodiments can be achieved. The same thing is applied to the twisting direction of the side member (the side strand 20A) around the core member (the core strand 10A).

(2) In the first embodiment, the individual side element wires as twisted wires of the side member 20 may be twisted in the direction which creates a cross angle α with respect to the twisting direction of the individual side element wires as the twisted wires of the core member 10. In this manner as well, the same effects as those described in the second embodiment can be achieved. (3) In the seventh embodiment, the color tones in the complementary color contrast relationship are not limited to red and green. Alternatively, for example, the color tones may be purple and yellow. In general, color tones may be in any colors which are in a relationship totally opposite to each other in a hue circle. 

1. A spiral rope for liana raising, comprising: a core member formed from austenite-based stainless steel twisted wires; and a side member formed from austenite-based stainless steel twisted wires, wherein said side member is spirally wound around said core member at intervals in a direction along a winding direction of a twiner of a liana.
 2. The spiral rope for liana raising according to claim 1, comprising: a core coating body coating said core member; and a side coating body coating said side member, wherein said core coating body and said side coating body are made of an identical or same kind of resin material with each other.
 3. The spiral rope for liana raising according to claim 2, wherein the identical or same kind of resin material for at least one of said core coating body and said side coating body is added with a material which imparts a color tone capable of assimilating the color tone of the liana.
 4. The spiral rope for liana raising according to claim 2, wherein the identical or same kind of resin material for at least one of said core coating body and said side coating body is added with a material which imparts a color tone capable of achieving complementary color contrast with respect to the color tone of the liana.
 5. The spiral rope for liana raising according to claim 1, wherein, said core member is a core strand formed from austenite-based stainless steel twisted wires, said side member is one or a plurality of bundles of side strands each formed from austenite-based stainless steel twisted wires, and a twisting direction of each element wire as the twisted wire of said one or plurality of bundles of side strands creates a predetermined cross angle with respect to a twisting direction of each element wire as the twisted wire of said core strand.
 6. The spiral rope for liana raising according to claim 2, wherein, said core member is a core strand formed from austenite-based stainless steel twisted wires, said side member is one or a plurality of bundles of side strands each formed from austenite-based stainless steel twisted wires, a twisting direction of each element wire as the twisted wire of said one or a plurality of bundles of side strands creates a predetermined cross angle with respect to t a twisting direction of each element wire as the twisted wire of said core strand, said core coating body is a core coating layer coating said core member, said side coating body is a side coating layer coating said one or a plurality of bundles of side strands individually, and said core coating layer is made of the identical or same kind of resin material as said side coating layer.
 7. The spiral rope for liana raising according to claim 3, wherein, said core member is a core strand formed from austenite-based stainless steel twisted wires, said side member is one or a plurality of bundles of side strands each formed from austenite-based stainless steel twisted wires, a twisting direction of each element wire as the twisted wire of said one or a plurality of bundles of side strands creates a predetermined cross angle with respect to t a twisting direction of each element wire as the twisted wire of said core strand, said core coating body is a core coating layer coating said core member, said side coating body is a side coating layer coating said one or a plurality of bundles of side strands individually, and said core coating layer is made of the identical or same kind of resin material as said side coating layer.
 8. The spiral rope for liana raising according to claim 4, wherein, said core member is a core strand formed from austenite-based stainless steel twisted wires, said side member is one or a plurality of bundles of side strands each formed from austenite-based stainless steel twisted wires, a twisting direction of each element wire as the twisted wire of said one or a plurality of bundles of side strands creates a predetermined cross angle with respect to t a twisting direction of each element wire as the twisted wire of said core strand, said core coating body is a core coating layer coating said core member, said side coating body is a side coating layer coating said one or a plurality of bundles of side strands individually, and said core coating layer is made of the identical or same kind of resin material as said side coating layer.
 9. The spiral rope according to any one of claims 6 to 8, wherein the predetermined cross angle is within a range of 90°±10°, and preferably 90°.
 10. The spiral rope for liana raising according to claim 1, wherein, said core member formed from a core rope member, said side member formed from a side rope member, and wherein said core rope member comprises: a core strand formed by twisting a plurality of bundles of strands each formed from austenite-based stainless steel twisted wires; and a plurality of bundles of side strands formed by twisting a plurality of bundles of strands each formed from austenite-based stainless steel twisted wires, said plurality of bundles of side strands being spirally continuously wound around said core strand, and said side rope member is a strand formed from austenite-based stainless steel twisted wires wound spirally around said core rope member at intervals in a direction along the winding direction of the twiner of the liana.
 11. The spiral rope for liana raising according to claim 2, wherein, said core member formed from a core rope member, said side member formed from a side rope member, and wherein said core rope member comprises: a core strand formed by twisting a plurality of bundles of strands each formed from austenite-based stainless steel twisted wires; and a plurality of bundles of side strands formed by twisting a plurality of bundles of strands each formed from austenite-based stainless steel twisted wires, said plurality of bundles of side strands being spirally continuously wound around said core strand, and said side rope member is a strand formed from austenite-based stainless steel twisted wires wound spirally around said core rope member at intervals in a direction along the winding direction of the twiner of the liana.
 12. The spiral rope for liana raising according to claim 3, wherein, said core member formed from a core rope member, said side member formed from a side rope member, and wherein said core rope member comprises: a core strand formed by twisting a plurality of bundles of strands each formed from austenite-based stainless steel twisted wires; and a plurality of bundles of side strands formed by twisting a plurality of bundles of strands each formed from austenite-based stainless steel twisted wires, said plurality of bundles of side strands being spirally continuously wound around said core strand, and said side rope member is a strand formed from austenite-based stainless steel twisted wires wound spirally around said core rope member at intervals in a direction along the winding direction of the twiner of the liana.
 13. The spiral rope for liana raising according to claim 4, wherein, said core member formed from a core rope member, said side member formed from a side rope member, and wherein said core rope member comprises: a core strand formed by twisting a plurality of bundles of strands each formed from austenite-based stainless steel twisted wires; and a plurality of bundles of side strands formed by twisting a plurality of bundles of strands each formed from austenite-based stainless steel twisted wires, said plurality of bundles of side strands being spirally continuously wound around said core strand, and said side rope member is a strand formed from austenite-based stainless steel twisted wires wound spirally around said core rope member at intervals in a direction along the winding direction of the twiner of the liana.
 14. The spiral rope for liana raising according to any one of claims 10 to 13, wherein the twisting direction of each element wire as the twisted wire of said strand which is said side rope member creates a predetermined cross angle with respect to the twisting direction of each element wire as the twisted wire of said plurality of bundles of side strands of said core rope member.
 15. The spiral rope according to claim 14, wherein the predetermined cross angle is within a range of 90°±10°, and preferably 90°.
 16. A wall surface greening system comprising a plurality of ropes supported on a wall surface into a predetermined stretching pattern so as to be opposed to the wall surface, wherein said plurality of ropes are a plurality of spiral ropes for liana raising comprising respectively: a core member formed from austenite-based stainless steel twisted wires; and a side member formed from austenite-based stainless steel twisted wires, wherein said side member is spirally wound around said core member at intervals in a direction along a winding direction of a twiner of a liana.
 17. A wall surface greening system according to claim 16, wherein said plurality of spiral ropes for liana raising comprising respectively: a core coating body coating said core member; and a side coating body coating said side member, wherein said core coating body and said side coating body are made of an identical or same kind of resin material with each other.
 18. A manufacturing method for a spiral rope for liana raising, comprising the steps of: forming a core coating layer and a side coating layer with an identical or same kind of resin material so as to coat a core member and a side member respectively formed from austenite-based stainless steel twisted wires; and winding said side member around said core member spirally at intervals in a direction along a winding direction of a twiner of a liana, wherein at least one of said core coating layer and said side coating layer is formed to coat at least one of said core member and said side member by means of a first colored resin material for assimilation obtained by mixing a colored resin material having a different molecular structure with the identical or same kind of resin material, or by means of a second colored resin material for assimilation obtained by mixing a colored resin material having a different melt index with the identical or same kind of resin material.
 19. A manufacturing method for a spiral rope for liana raising, comprising the steps of: forming a core coating layer and a side coating layer with an identical or same kind of resin material so as to coat a core member and a side member respectively formed from austenite-based stainless steel twisted wires; and winding said side member around said core member spirally at intervals in a direction along a winding direction of a twiner of a liana, wherein at least one of said core coating layer and said side coating layer is formed to coat at least one of said core member and said side member by means of a first colored resin material for complementary color contrast obtained by mixing a colored resin material having a different composition with the identical or same kind of resin material, or by means of a second colored resin material for complementary color contrast obtained by mixing a colored resin material having a different melt index with the identical or same kind of resin material. 